Steam boiler



Feb. 12, 1935.

J. E. BLACK STEAM BOILER 2 She e tS-She'et 1 Original Filed Jan. 19, 1923 Feb. 12, 1935. J. E. BLACK 1,990,476

- STEAM BOILER Original Fi led Jan. 19, 1928 2 Sheets-Sheet 2 VENTOR M aw BY WAM/r ATTORNEYJ Patented Feb. 12, 1935 STEAM BOILER John E. Black, Rumson, N; 3., assignor, by mesne assignments, to Fuller Lehigh Company, a corporation of Delaware I Application 22 Claims.

My present invention relates to steam boilers and particularly to improvements connected with the furnaces and settings thereof. This is a continuation in part of my application Serial No. 184,852, filed April 19, 1927, and will be best understood from the following description and the annexed drawings, in which Fig. 1 is a vertical sectional elevation, with parts broken away, of an illustrative embodiment of my invention as applied to a boiler of the Stirling type; Fig. 2 is an enlarged view of a portion of Fig. 1 and also a section on line 2-2 of Fig. 3; Fig. 3 is a view of Fig. 2 taken along the line 33, and Fig. 4 is a section on the line 44 of Fig. 3.

Like reference characters indicate like parts in the several views.

In the illustrative embodiment, a boiler of the Stirling type has upper steam and water drum 10 (only one of which is shown but of which there may be two or more) and a lower water drum 11 connected by banks of tubes 12 and provided with baiiling in the usual manner to provide a series of longitudinal passes of the gases from the furnace 13 over the water tubes.

- In the form illustrated, the furnace may be fired by an underieed stoker for example. A wall 15 of any suitable refractory or the like extends along the rear of the furnace 13 and is spaced from the setting wall 16. This wall 15 is water cooled by the tubes 1'? which support the wall, the upper ends of these tubes being connected to a header 18. The lower ends of the tubes 17 are connected to a header or box 19 carried on a support 20 on the inside of the setting wall 16. The header 18 is permitted to move up and down when the tubes 17 expand and contract. The downcomer tubes 21 connect the header 19 with the drum 11 and the pipe 22 conv nects the header 18 with the steam space of one of the upper steam and water drums 10. By

this arrangement of piping described, it will be evident that water will flow from the drum 11 through tubes 21 to the header 19. and from thence through the tubes 17, the header 18v and the pipe 22 to the upper steam andwater drum, thus providing a water circulation through the cooling tubes 17. One or more tubes 23 may be,

connected betweenthe headers 18 and 19 to provide local circulation and a drain or blow ed 24 may be provided for the lower drum 19. The

of blocks fastened to the tubes (in amanner not illustrated) The header 18 is positioned adjacent to but January 19, 1928, Serial No. 247,815

Renewed May 31, 1934 not in contact with the drum 11, and, ordinarily, a portion of the drum 11 would come at a point adjacent the furnace 13. It is desirable to protect the drum 11 from the excessive effect of the radiant heat of the furnace, and this is true particularly if a butt strap is subjected to this heat.

It will be understoodthat the drum 11 and header 18 will shift in position because the boiler is suspended from the upper drums and the tubes 12 and 17 expand and contract in the operation of the boiler. For that" reason, it is necessary to provide a flexible gas seal between the vertical Wall 15 and the drum 11, to provide for the relative movement between them. The header 18 is not fixedly supportedin relation to the setting, but is free to move in accordance with the expansion-of the wall tubes 17 connected to it. Consequently there may be very considerable relative motion between the header 18 and the drum 11. To provide a seal between the wall 15 and the drum 11 and, at the. same time, to protect the drum, I provide an intermediate wall made up of tile 25 in engagementwith bulb portions 26 of the backing plate 27, thisbacking plate having a supporting lip 28 on which the tile 25 rest and the backingplates bein DIO- vided attheirupper ends with hook portions 29 engaging a hook member 30 connected to the drum 11. The structure just described bridges a space between the drum or water chamber 11 and the furnace wall 15. Hence, it may be properly specified as including a bridge wall. The upperpart of the hook member 3 0 may be termed a bridge wall projection, and the structure including the elements 25, 26, 27, 28, and 29 may be referredto as constituting a wall projection inasmuch as it projects from the wall l5. Covering tile 25* may rest upon the upper edge of the wall 25. The lower end of the vertical wall formed of the tile 25 isheld between an'upstanding block 31 forming part of the wall 15 carried onthe tubes 17 and a metallic plate 32 fastened to the tubes 17 and also forming a part of the wall.

It will be noted that the intermediate wall is drum 11 so that it can swing and its lower portion has a sliding joint connection with the wall 15. 18 can move in relation to the drum 11, without breaking the seal between the wall 15 and the drum 11 and without destroying the short ver-. tical-wall 25. r

It will be understood that in the form of boiler Consequently the wall 15' and the header. r

illustrated, there will be a tendency for hot gases from the furnace 13 to short circuit beneath the drum 11 through any cracks in the wall 15. To prevent this the space between the wall 16 and the drum 11 is sealed by hooked plate sealing members 34 engaging hook members 35 attached to the drum 11. The lower ends of the members 34 are turned upwardly and rest at an angle upon a portion of the setting 36. The tubes 21 pass through openings in the portion of the setting 36, sleeves and gaskets of yielding material, such as asbestos, preferably surrounding said pipes where they pass through said openings.

With the ararngement just described, it is evidet that any leakage past the wall 25 or wall 15 and the metal work connected to them would be prevented from passing, below the drum 11 to the other side of the boiler. Y

It will be understood that the arrangements which I have shown are merely illustrative and wall to a point in front of said lower drum, said second named wall being suspended from said drum andhaving a sliding connection with said first named wall.

2; A water tube boiler having a lower drum and having a wall'below and in advance of the lower drum of the boiler, cooling tubes to support said wall, means to support said tubes, a wall extending upwardly from said first named wall to a point in front of said lower drum, said second named wall being suspended'from said drum and having a sliding connectionwithsaid first named wall.

3. A water tube boiler havinga lower drum and having a wall below and in advance of the lower drum of theboiler, coolingtubes to support said wall,a {wall extending upwardly from said first named wall to a point in front of said lower drum, said second named wall being suspended from said drum and having a sliding connection with said first named wall and adapted to form a substantially 'g'as'tight seal therewith.

4.- A water tube boiler having a lower drum and havinga wall below and in advance of the lower drum of the boiler, cooling tubes to support said wall, a header located below said lower drum and connected'to said cooling tubes, a wall extending upwardly from said first named wall to a point in frontof-said lower drum, said second named wallbeingarranged to permit relative motion between it and the first named wall while maintaining a gas seal between them, said second named wall being supported by said lower drum.

5. A water tube boiler having a lower drum and" having a wall below and in advance of the lower drum of the boiler, cooling tubes to support said wall, a wall extending upwardly from said first 6. A. water tube boiler having a lower drum and; having an auxiliarywall between theboiler fur nace and the rear wall thereof, said auxilia'ry w all comprising a row of water tubes connected to the water circulation system of said boiler, and means forminga gas seal connection supported by said boiler and forming a gas tight sliding joint with said wall, whereby a seal is provided between said auxiliary wall and said lower drum.

'7. A water tube boiler having a lower drum and having an auxiliary wall between the boiler furnace and the rear wall thereof, said auxiliary wall comprising a row of water tubes and an upper and a lower header connected to the water circuhaving an auxiliary wall between the boiler furnace and the rear wall thereof, said auxiliary wall comprising a row of water tubes and an upper and a lower header connected to, the water circulation-system of said boiler, and tubes cone necting said headers located between said auxiliary wall and therear wall of the boiler furnace, and means forming a seal between said auxiliary wall and said drum. b

9. In a water tube boilena mud drum, a header spaced from said drum, an intermediate wall suspendedfrom said drum, a" wall connected to saidheader, and a sliding joint between said walls."[' 10. In a water tube boiler, a mud'drum, a header spaced fromsaid drum, an intermediate'wall suspended from said drum, a wall connected to said header, and'a sliding joint between thelower end of saids'uspended wall andthe other wall. 11. In a water tube boiler, a mud drum, a header spaced from said drum, said drum and header being movable relative to eachother due to expansion and contraction, an intermediate wall suspended from said drum, a wall connected to said header, and a sliding joint between said walls. a 7 j I 12. In' awater tube boiler, a mud drum, a header spaced from said drum and parallel thereto, an intermediate wall suspended from said drum, a wall connected to said header, and a sliding joint between said walls.

13. Ina water tube boiler, a mud drum,a head"- er spaced fromsaid drum, an-intermediate wall suspended from said drum, a row of' tubes con;- nected to saidheader, tile supported on said tubes,

and a sliding connectionbetween said wall and tile. v

14. In a water tube boiler,-a mud drum,- a head er spaced from said drum, an intermediate wallsuspended from said-drum, said'wall comprising a metal plate and'tile supportedby said plate,

a wall connected to said header, and a sliding jointbetweensaid walls. r

15. A water-tube boiler provided witha water chamber. andhaving a wall below and in advance of said water chamber, cooling tubes to support said wa1l, a wall extendingupwardly from said firstnamed-wall to a point in front of said water chamber, said second-named wall being sus-,- pended from said water chamber and having a sliding connection with said first-named wall;

-=16; A watertube boiler'provided'with a water chamber and havingawall below and in advance of said water chamber, cooling tubes to support;

said wall, means to support said tubes, a, wall extending upwardly from said first-nan ed'wall to a point in'front'of said lower water chamber, Said. e eeer m wall e n u pended rom said water chamber and having a sliding connection with said first-named Wall.

17. In a water tube boiler, a water chamber, a wall spaced from said water chamber and having fluid-cooled tubes therein and supporting it, a wall suspended from said water chamber and a sliding joint between said walls.

18. In a boiler and furnace organization, a row of spaced metallic members arranged along one side of the furnace, heat resisting material supported by said members and forming a furnace wall face, a fluid heat exchange device including water conducting tubes positioned above said face and a water chamber positioned near the top of said face and connected to said tubes, independent supports for the row of members and the device providing for relative movements thereof near the top of said face, a heat resisting intermediate wall supported above the face so as to contact with said device and prevent the escape of furnace gases between the face and the device, and means forming a guideway for the intermediate wall when said relative movements take place, said means maintaining the intermediate wall in its operative position.

19. In a boiler and furnace organization, a row of spaced metallic members arranged along one side of the furnace, heat resisting material supported by said members and forming a furnace wall, a fluid heat exchange device including water conducting tubes positioned above said wall and a water chamber positioned near the top of said wall and connected to said tubes, independent supports for the row of members and the device providing for relative movements thereof near the top of said wall, and a heat resisting intermediate wall supported above the first mentioned wall so as to contact with said device and prevent the escape of furnace gases between the furnace wall and the device, said intermediate wall being so associated with the heat exchange device and the furnace wall that there can be relative movements therebetween.

20. In a boiler and furnace organization, a furnace Wall section having spaced metallic members, heat resisting blocks supported by said members, a fluid heat exchange section including a water chamber with tubes leading therefrom, an intermediate Wall forming a furnace gas seal between said sections, means on one of said sections for rockably supporting said intermediate wall from that section, and means whereby the intermediate wall has sliding movement relative to the other section.

21. In a boiler and furnace organization, a furnace wall section having spacedmetallic members, heat resisting blocks supported by said members, a fluid heat exchange section including a water chamber with tubes leading therefrom, an intermediate wall forming a furnace gas seal between said sections, means on one of said sections forming a pocket construction for rockably supporting said intermediate wall from that section, and means whereby the intermediate wall has sliding movement relative to the other section.

22. In combination, a top supported water tube steam boiler including a water chamber having fluid heat exchange tubes connected thereto, a bottom supported furnace wall including Wall tubes connected to an upper header located at a position adjacent the water chamber, separate supports for the boiler and the furnace wall so that they are relatively-movable at a position near the top of the wall, heat resisting material exposed between the tubes of the wall and gas seal joint constructions operatively disposed between the top of the wall and the boiler and effecting a furnace closure at that position, said constructions including overlapping parts one of which is carried by the boiler and the other of which is fixed relative to the wall.

JOHN E. BLACK. 

